openstack team mailing list archive

[Kiall Mac Innes <kiall@xxxxxxxxxxxx>]

On Fri, Aug 31, 2012 at 6:01 PM, Trinath Somanchi <
trinath.somanchi@xxxxxxxxx> wrote:

> Hi Vish-
>
> Thanks for the reply.
>
> I need much more info on these.
>
> [1] Where this Metadata comes into picture., while launching the instance,
> or after instance is launched ?
>

As the docs linked to by Vish show - metadata can be set at the same time
as the server is created, or it can be set after the server has been built.

[2] In the Essex release, how can he see what metadata is being prepared
> and used ?
>

One of Vish's links includes the documentation for the "List Metadata" API
call.


> [3] What is the use of this metadata.
>

Anything you like. Openstack does nothing with the metadata.


> [4] In scenario of Nova+Quantum+OVS (Essex Release) at what places this
> metadata is used, How is it prepared, where it is parsed and understood,
> What data does it contain?
>

Only nova knows anything about the metadata - and even then - all it knows
is how to store/retrieve it.


>
> Though I have too many questions, I'm in need of these since, Want to
> understand the ROLE of metadata concept?
>

The role is simple - you can set metadata on a server, and retrieve it
later if you wish.


>
> Kindly please help me understand the same.
>
> --
> TNS
>